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-rw-r--r--desktop/plotters.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/desktop/plotters.h b/desktop/plotters.h
index 65abd1774..d10de3a2a 100644
--- a/desktop/plotters.h
+++ b/desktop/plotters.h
@@ -39,8 +39,8 @@ struct plotter_table {
bool (*bitmap_tile)(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
bool repeat_x, bool repeat_y);
- bool (*group_start)(const char *name);
- bool (*group_end)(void);
+ bool (*group_start)(const char *name); /** optional */
+ bool (*group_end)(void); /** optional */
};
/** Current plotters, must be assigned before use. */